Blank Screen From Windows Client Browsers

We recently noticed that when accessing MONyog 4.5.1 from Windows client browsers (IE and Chrome), that we were getting a blank login screen. We are hitting the MONyog webserver (on port 5556) but nothing displays in the browser. The same installation works fine when accessed from OS X clients (safari and chrome).

In an attempt to fix this I have upgraded to the latest version (5.1.0) and can confirm that this still works from OS X, however it is still broken for Windows clients.